more zoom/center fixes. RLEs now load centered and visible.

bugs though

.gitignore

@@ -3,6 +3,3 @@ bak
 dump*
 rect*
 *profile
-*prof
-*lif
-*rle

Makefile

@@ -1,4 +1,97 @@
-.PHONY: all
-all:
-	make -C src
-	mv src/golsky .
+# Copyright © 2024 Thomas von Dein
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+
+#
+# no need to modify anything below
+tool      = golsky
+VERSION   = $(shell grep VERSION main.go | head -1 | cut -d '"' -f2)
+archs     = darwin freebsd linux windows
+PREFIX    = /usr/local
+UID       = root
+GID       = 0
+HAVE_POD := $(shell pod2text -h 2>/dev/null)
+#TAGS      = -tags=ebitenginedebug
+
+all: buildlocal
+
+
+buildlocal:
+	go build $(TAGS) -o $(tool)
+
+install: buildlocal
+	install -d -o $(UID) -g $(GID) $(PREFIX)/bin
+	install -d -o $(UID) -g $(GID) $(PREFIX)/man/man1
+	install -o $(UID) -g $(GID) -m 555 $(tool)  $(PREFIX)/sbin/
+	install -o $(UID) -g $(GID) -m 444 $(tool).1 $(PREFIX)/man/man1/
+
+clean:
+	rm -rf $(tool) coverage.out testdata t/out
+
+test: clean
+	mkdir -p t/out
+	go test ./... $(ARGS)
+
+testlint: test lint
+
+lint:
+	golangci-lint run
+
+lint-full:
+	golangci-lint run --enable-all --exclude-use-default --disable exhaustivestruct,exhaustruct,depguard,interfacer,deadcode,golint,structcheck,scopelint,varcheck,ifshort,maligned,nosnakecase,godot,funlen,gofumpt,cyclop,noctx,gochecknoglobals,paralleltest
+
+testfuzzy: clean
+	go test -fuzz ./... $(ARGS)
+
+singletest:
+	@echo "Call like this: make singletest TEST=TestPrepareColumns ARGS=-v"
+	go test -run $(TEST) $(ARGS)
+
+cover-report:
+	go test ./... -cover -coverprofile=coverage.out
+	go tool cover -html=coverage.out
+
+goupdate:
+	go get -t -u=patch ./...
+
+buildall:
+	./mkrel.sh $(tool) $(VERSION)
+
+release: buildall
+	gh release create $(VERSION) --generate-notes releases/*
+
+show-versions: buildlocal
+	@echo "### golsky version:"
+	@./golsky -V
+
+	@echo
+	@echo "### go module versions:"
+	@go list -m all
+
+	@echo
+	@echo "### go version used for building:"
+	@grep -m 1 go go.mod
+
+# lint:
+# 	golangci-lint run -p bugs -p unused
+
+buildwasm:
+	env GOOS=js GOARCH=wasm go build -o $(tool).wasm $(LDFLAGS) .
+
+zipwasm:
+	zip -r openquell-$(SHORTVERSION).zip index.html $(tool).wasm wasm_exec.js
+
+wasm: buildwasm zipwasm
+	@ls -l $(tool)-$(SHORTVERSION).zip

TODO.md

@@ -1,46 +1,17 @@
 - add all other options like size etc
-- do not process history if turned off
-- add gif export
-- add toolbar
-- turn input ifs to switch
-- add insert mode for edit like vi
-- use left mouse to drag grid unless insert mode is active
-- keep supporting middle mouse to drag so that dragging is possible in insert mode
-- print current mode to the bottom like pause, insert and mark
-- add https://www.ibiblio.org/lifepatterns/october1970.html
-- use uint8 or bool, history needs not be larger than 256 anyway
-- history: dont count age but do calc to get index to age tile based on cell age
-- maybe pre calc neighbors as 8 slice of pointers to neighboring cells to faster do the count
-- https://mattnakama.com/blog/go-branchless-coding/
-- add performance measurements, see:
-  DrawTriangles: https://github.com/TLINDEN/testgol
-  WritePixels:   https://github.com/TLINDEN/testgol/tree/wrpixels
-https://www.tasnimzotder.com/blog/optimizing-game-of-life-algorithm
 
-- Speed
-  https://conwaylife.com/forums/viewtopic.php?f=7&t=3237
+- changing options mid-game has no effect in most cases, even after a restart
 
-- Patterns:
+- Statefile loading does not work correclty anymore. With larger grids
+  everything  is empty.  With square  grids part  of the  grid is  cut
+  off. Smaller grids load though
   
-A   Catagolue   textcensus   of,  say,   period-2   oscillators   from
-non-symmetrical soups can be found at
+- Also  when loading a state  file, centering doesn't work  anymore, I
+  think the geom calculation is overthrown by the parser func. So, put
+  this calc into its own func and  always call. Or - as stated below -
+  put it onto camera.go and call from Init().
   
-https://catagolue.hatsya.com/textcensus/b3s23/C1/xp2
-
-The URL is made by just adding the prefix "text" to the word "census",
-in any URL linked to from a Catagolue census page such as this one:
-
-https://catagolue.hatsya.com/census/b3s23/C1
-
-Format:
-https://conwaylife.com/wiki/Apgcode
-
-
-Collections:
-
-https://conwaylife.com/wiki/Pattern_of_the_Year
-https://www.ibiblio.org/lifepatterns/
-https://entropymine.com/jason/life/
-https://github.com/Matthias-Merzenich/jslife-moving
-https://conwaylife.com/ref/mniemiec/lifepage.htm
-https://conwaylife.com/wiki/Spaceship ff.
+- Zoom 0 on reset only  works when world<screen.  otherwise zoom would
+  be negative So, on Init() memoize  centered camera position or add a
+  Center() function  to camera.go.  Then on  reset calculate  the zoom
+  level so that the world fits into the screen.

camera.go

@@ -1,5 +1,3 @@
-// this comes from the camera example but I enhanced it a little bit
-
 package main
 
 import (
@@ -11,12 +9,9 @@ import (
 )
 
 type Camera struct {
-	ViewPort          f64.Vec2
-	Position          f64.Vec2
-	ZoomFactor        int
-	InitialZoomFactor int
-	InitialPosition   f64.Vec2
-	ZoomOutFactor     int
+	ViewPort   f64.Vec2
+	Position   f64.Vec2
+	ZoomFactor int
 }
 
 func (c *Camera) String() string {
@@ -37,17 +32,15 @@ func (c *Camera) worldMatrix() ebiten.GeoM {
 	m := ebiten.GeoM{}
 	m.Translate(-c.Position[0], -c.Position[1])
 
-	viewportCenter := c.viewportCenter()
-
 	// We want to scale and rotate around center of image / screen
-	m.Translate(-viewportCenter[0], -viewportCenter[1])
+	m.Translate(-c.viewportCenter()[0], -c.viewportCenter()[1])
 
 	m.Scale(
 		math.Pow(1.01, float64(c.ZoomFactor)),
 		math.Pow(1.01, float64(c.ZoomFactor)),
 	)
 
-	m.Translate(viewportCenter[0], viewportCenter[1])
+	m.Translate(c.viewportCenter()[0], c.viewportCenter()[1])
 	return m
 }
 
@@ -68,14 +61,8 @@ func (c *Camera) ScreenToWorld(posX, posY int) (float64, float64) {
 	}
 }
 
-func (c *Camera) Setup() {
-	c.Position[0] = c.InitialPosition[0]
-	c.Position[1] = c.InitialPosition[1]
-	c.ZoomFactor = c.InitialZoomFactor
-}
-
 func (c *Camera) Reset() {
-	c.Position[0] = c.InitialPosition[0]
-	c.Position[1] = c.InitialPosition[1]
-	c.ZoomFactor = c.ZoomOutFactor
+	c.Position[0] = 0
+	c.Position[1] = 0
+	c.ZoomFactor = 0
 }

config.go

@@ -30,7 +30,6 @@ type Config struct {
 	Restart, RestartGrid, RestartCache     bool
 	StartWithMenu                          bool
 	Zoomfactor                             int
-	ZoomOutFactor                          int
 	InitialCamPos                          []float64
 	DelayedStart                           bool // if true game, we wait. like pause but program induced
 
@@ -52,40 +51,6 @@ const (
 	DEFAULT_GEOM        = "640x384"
 )
 
-func (config *Config) SetupCamera() {
-	config.Zoomfactor = DEFAULT_ZOOMFACTOR
-
-	// calculate the initial cam pos. It is negative if the total grid
-	// size  is smaller than  the screen  in a centered  position, but
-	// it's zero if it's equal or larger than the screen.
-	config.InitialCamPos = make([]float64, 2)
-
-	config.InitialCamPos[0] = float64(((config.ScreenWidth - (config.Width * config.Cellsize)) / 2) * -1)
-	if config.Width*config.Cellsize >= config.ScreenWidth {
-		// must be positive if world wider than screen
-		config.InitialCamPos[0] = math.Abs(config.InitialCamPos[0])
-	}
-
-	// same for Y
-	config.InitialCamPos[1] = float64(((config.ScreenHeight - (config.Height * config.Cellsize)) / 2) * -1)
-	if config.Height*config.Cellsize > config.ScreenHeight {
-		config.InitialCamPos[1] = math.Abs(config.InitialCamPos[1])
-	}
-
-	// Calculate  zoom out factor, which  shows 100% of the  world. We
-	// need to reverse math.Pow(1.01,  $zoomfactor) to get the correct
-	// percentage of  the world to show.  I.e: with  a ScreenHeight of
-	// 384px and a world of 800px the factor to show 100% of the world
-	// is  -75: math.Log(384/800) / math.Log(1.01).  The 1.01 constant
-	// is being used in camera.go:worldMatrix().
-
-	// FIXME: determine if the diff is larger on width, then calc with
-	// width instead of height
-	config.ZoomOutFactor = int(
-		math.Log(float64(config.ScreenHeight)/(float64(config.Height)*float64(config.Cellsize))) /
-			math.Log(1.01))
-}
-
 // parse given window geometry and adjust game settings according to it
 func (config *Config) ParseGeom(geom string) error {
 	// force a geom
@@ -108,37 +73,40 @@ func (config *Config) ParseGeom(geom string) error {
 	config.ScreenHeight = height
 
 	config.Cellsize = DEFAULT_CELLSIZE
+	config.Zoomfactor = DEFAULT_ZOOMFACTOR
+
+	// calculate the initial cam pos. It is negative if the total grid
+	// size  is smaller than  the screen  in a centered  position, but
+	// it's zero if it's equal or larger than the screen.
+	config.InitialCamPos = make([]float64, 2)
+
+	config.InitialCamPos[0] = float64(((config.ScreenWidth - (config.Width * config.Cellsize)) / 2) * -1)
+	if config.Width*config.Cellsize >= config.ScreenWidth {
+		// must be positive if world wider than screen
+		config.InitialCamPos[0] = math.Abs(config.InitialCamPos[0])
+	}
+
+	if config.Height*config.Cellsize > config.ScreenHeight {
+		config.InitialCamPos[1] = math.Abs(float64(((config.ScreenHeight - (config.Height * config.Cellsize)) / 2)))
+	}
 
 	return nil
 }
 
-// check if we have  been given an RLE or LIF file  to load, then load
-// it and adjust game settings accordingly
+// check if we have  been given an RLE file to load,  then load it and
+// adjust game settings accordingly
 func (config *Config) ParseRLE(rlefile string) error {
 	if rlefile == "" {
 		return nil
 	}
 
-	var rleobj *rle.RLE
-
-	if strings.HasSuffix(rlefile, ".lif") {
-		lifobj, err := LoadLIF(rlefile)
-		if err != nil {
-			return err
-		}
-
-		rleobj = lifobj
-	} else {
-		rleobject, err := rle.GetRLE(rlefile)
-		if err != nil {
-			return err
-		}
-
-		rleobj = rleobject
+	rleobj, err := rle.GetRLE(rlefile)
+	if err != nil {
+		return err
 	}
 
 	if rleobj == nil {
-		return errors.New("failed to load pattern file (uncatched module error)")
+		return errors.New("failed to load RLE file (uncatched module error)")
 	}
 
 	config.RLE = rleobj
@@ -164,6 +132,25 @@ func (config *Config) ParseRLE(rlefile string) error {
 	return nil
 }
 
+// parse a state file, if given, and adjust game settings accordingly
+func (config *Config) ParseStatefile() error {
+	if config.Statefile == "" {
+		return nil
+	}
+
+	grid, err := LoadState(config.Statefile)
+	if err != nil {
+		return fmt.Errorf("failed to load game state: %s", err)
+	}
+
+	config.Width = grid.Width
+	config.Height = grid.Height
+	config.Cellsize = config.ScreenWidth / config.Width
+	config.StateGrid = grid
+
+	return nil
+}
+
 func (config *Config) EnableCPUProfiling(filename string) error {
 	if filename == "" {
 		return nil
@@ -198,7 +185,8 @@ func ParseCommandline() (*Config, error) {
 		"game speed: the higher the slower (default: 10)")
 
 	pflag.StringVarP(&rule, "rule", "r", "B3/S23", "game rule")
-	pflag.StringVarP(&rlefile, "pattern-file", "f", "", "RLE or LIF pattern file")
+	pflag.StringVarP(&rlefile, "rle-file", "f", "", "RLE pattern file")
+	pflag.StringVarP(&config.Statefile, "load-state-file", "l", "", "game state file")
 
 	pflag.BoolVarP(&config.ShowVersion, "version", "v", false, "show version")
 	pflag.BoolVarP(&config.Paused, "paused", "p", false, "do not start simulation (use space to start)")
@@ -226,14 +214,17 @@ func ParseCommandline() (*Config, error) {
 		return nil, err
 	}
 
+	err = config.ParseStatefile()
+	if err != nil {
+		return nil, err
+	}
+
 	// load  rule from commandline  when no  rule came from  RLE file,
 	// default is B3/S23, aka conways game of life
 	if config.Rule == nil {
 		config.Rule = ParseGameRule(rule)
 	}
 
-	config.SetupCamera()
-
 	//repr.Println(config)
 	return &config, nil
 }
@@ -243,6 +234,7 @@ func (config *Config) TogglePaused() {
 }
 
 func (config *Config) ToggleDebugging() {
+	fmt.Println("DEBUG TOGGLED")
 	config.Debug = !config.Debug
 }
 
@@ -255,11 +247,3 @@ func (config *Config) ToggleGridlines() {
 	config.ShowGrid = !config.ShowGrid
 	config.RestartCache = true
 }
-
-func (config *Config) ToggleEvolution() {
-	config.ShowEvolution = !config.ShowEvolution
-}
-
-func (config *Config) ToggleWrap() {
-	config.Wrap = !config.Wrap
-}

game.go

@@ -49,14 +49,10 @@ func (game *Game) Layout(outsideWidth, outsideHeight int) (int, int) {
 
 func (game *Game) Update() error {
 	scene := game.GetCurrentScene()
-
-	if quit := scene.Update(); quit != nil {
-		return quit
-	}
+	scene.Update()
 
 	next := scene.GetNext()
 	if next != game.CurrentScene {
-		game.Scenes[next].SetPrevious(game.CurrentScene)
 		scene.ResetNext()
 		game.CurrentScene = next
 	}

grid.go

@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"math/rand"
 	"os"
+	"strconv"
 	"strings"
 	"time"
 
@@ -112,8 +113,30 @@ func (grid *Grid) LoadRLE(pattern *rle.RLE) {
 	}
 }
 
-// load a lif file parameters like R and P are not supported yet
-func LoadLIF(filename string) (*rle.RLE, error) {
+// save  the contents  of  the  whole grid  as  a  simple mcell  alike
+// file. One line per row, 0 for dead and 1 for life cell.
+func (grid *Grid) SaveState(filename string) error {
+	file, err := os.Create(filename)
+	if err != nil {
+		return fmt.Errorf("failed to open state file: %w", err)
+	}
+	defer file.Close()
+
+	for y := range grid.Data {
+		for _, cell := range grid.Data[y] {
+			_, err := file.WriteString(strconv.FormatInt(cell, 10))
+			if err != nil {
+				return fmt.Errorf("failed to write to state file: %w", err)
+			}
+		}
+		file.WriteString("\n")
+	}
+
+	return nil
+}
+
+// the reverse of the above, load a mcell file
+func LoadState(filename string) (*Grid, error) {
 	fd, err := os.Open(filename)
 	if err != nil {
 		return nil, err
@@ -123,60 +146,33 @@ func LoadLIF(filename string) (*rle.RLE, error) {
 
 	scanner.Split(bufio.ScanLines)
 
-	gothead := false
-
-	grid := &rle.RLE{}
+	grid := &Grid{}
 
 	for scanner.Scan() {
-		line := scanner.Text()
-		items := strings.Split(line, "")
-
-		if len(items) < 0 {
-			continue
-		}
-
-		if strings.Contains(line, "# r") {
-			parts := strings.Split(line, " ")
-			if len(parts) == 2 {
-				grid.Rule = parts[1]
-			}
-
-			continue
-		}
-
-		if items[0] == "#" {
-			if gothead {
-				break
-			}
-
-			continue
-		}
-
-		gothead = true
-
-		row := make([]int, len(items))
+		items := strings.Split(scanner.Text(), "")
+		row := make([]int64, len(items))
 
 		for idx, item := range items {
-			switch item {
-			case ".":
-				row[idx] = 0
-			case "o":
-				fallthrough
-			case "*":
-				row[idx] = 1
-			default:
-				return nil, errors.New("cells must be . or o")
+			num, err := strconv.ParseInt(item, 10, 64)
+			if err != nil {
+				return nil, err
 			}
+
+			if num > 1 {
+				return nil, errors.New("cells must be 0 or 1")
+			}
+
+			row[idx] = num
 		}
 
-		grid.Pattern = append(grid.Pattern, row)
+		grid.Data = append(grid.Data, row)
 	}
 
 	// sanity check the grid
 	explen := 0
 	rows := 0
 	first := true
-	for _, row := range grid.Pattern {
+	for _, row := range grid.Data {
 		length := len(row)
 
 		if first {
@@ -199,43 +195,10 @@ func LoadLIF(filename string) (*rle.RLE, error) {
 	return grid, nil
 }
 
-// save  the contents  of  the  whole grid  as  a  simple lif  alike
-// file. One line per row, 0 for dead and 1 for life cell.
-// file format: https://conwaylife.com/wiki/Life_1.05
-func (grid *Grid) SaveState(filename, rule string) error {
-	file, err := os.Create(filename)
-	if err != nil {
-		return fmt.Errorf("failed to open state file: %w", err)
-	}
-	defer file.Close()
-
-	fmt.Fprintf(file, "#Life 1.05\n#R %s\n#D golsky state file\n#P -1 -1\n", rule)
-
-	for y := range grid.Data {
-		for _, cell := range grid.Data[y] {
-			row := ""
-			switch cell {
-			case 1:
-				row += "o"
-			case 0:
-				row += "."
-			}
-
-			_, err := file.WriteString(row)
-			if err != nil {
-				return fmt.Errorf("failed to write to state file: %w", err)
-			}
-		}
-		file.WriteString("\n")
-	}
-
-	return nil
-}
-
 // generate filenames for dumps
 func GetFilename(generations int64) string {
 	now := time.Now()
-	return fmt.Sprintf("dump-%s-%d.lif", now.Format("20060102150405"), generations)
+	return fmt.Sprintf("dump-%s-%d.gol", now.Format("20060102150405"), generations)
 }
 
 func GetFilenameRLE(generations int64) string {

scene-menu.go

@@ -14,7 +14,6 @@ type SceneMenu struct {
 	Game      *Game
 	Config    *Config
 	Next      SceneName
-	Prev      SceneName
 	Whoami    SceneName
 	Ui        *ebitenui.UI
 	FontColor color.RGBA
@@ -39,10 +38,6 @@ func (scene *SceneMenu) GetNext() SceneName {
 	return scene.Next
 }
 
-func (scene *SceneMenu) SetPrevious(prev SceneName) {
-	scene.Prev = prev
-}
-
 func (scene *SceneMenu) ResetNext() {
 	scene.Next = scene.Whoami
 }
@@ -104,9 +99,9 @@ func (scene *SceneMenu) Init() {
 			scene.SetNext(Options)
 		})
 
-	separator1 := NewSeparator(3)
-	separator2 := NewSeparator(3)
-	separator3 := NewSeparator(10)
+	separator1 := NewSeparator()
+	separator2 := NewSeparator()
+	separator3 := NewSeparator()
 
 	cancel := NewMenuButton("Back",
 		func(args *widget.ButtonClickedEventArgs) {

scene-options.go

@@ -13,7 +13,6 @@ type SceneOptions struct {
 	Game      *Game
 	Config    *Config
 	Next      SceneName
-	Prev      SceneName
 	Whoami    SceneName
 	Ui        *ebitenui.UI
 	FontColor color.RGBA
@@ -37,10 +36,6 @@ func (scene *SceneOptions) GetNext() SceneName {
 	return scene.Next
 }
 
-func (scene *SceneOptions) SetPrevious(prev SceneName) {
-	scene.Prev = prev
-}
-
 func (scene *SceneOptions) ResetNext() {
 	scene.Next = scene.Whoami
 }
@@ -95,7 +90,7 @@ func (scene *SceneOptions) Init() {
 
 	invert := NewCheckbox("Invert",
 		func(args *widget.CheckboxChangedEventArgs) {
-			scene.Config.ToggleInvert()
+			scene.Config.Invert = true
 		})
 	scene.SetInitialValue(invert, scene.Config.Invert)
 
@@ -105,31 +100,17 @@ func (scene *SceneOptions) Init() {
 		})
 	scene.SetInitialValue(gridlines, scene.Config.ShowGrid)
 
-	evolution := NewCheckbox("Show evolution traces",
-		func(args *widget.CheckboxChangedEventArgs) {
-			scene.Config.ToggleEvolution()
-		})
-	scene.SetInitialValue(evolution, scene.Config.ShowEvolution)
-
-	wrap := NewCheckbox("Wrap around edges",
-		func(args *widget.CheckboxChangedEventArgs) {
-			scene.Config.ToggleWrap()
-		})
-	scene.SetInitialValue(wrap, scene.Config.Wrap)
-
-	separator := NewSeparator(3)
+	separator := NewSeparator()
 
 	cancel := NewMenuButton("Close",
 		func(args *widget.ButtonClickedEventArgs) {
-			scene.SetNext(scene.Prev)
+			scene.SetNext(Menu)
 		})
 
 	rowContainer.AddChild(pause)
 	rowContainer.AddChild(debugging)
 	rowContainer.AddChild(invert)
 	rowContainer.AddChild(gridlines)
-	rowContainer.AddChild(evolution)
-	rowContainer.AddChild(wrap)
 	rowContainer.AddChild(separator)
 	rowContainer.AddChild(cancel)
 

scene-play.go

@@ -5,6 +5,7 @@ import (
 	"image"
 	"image/color"
 	"log"
+	"os"
 
 	"github.com/hajimehoshi/ebiten/v2"
 	"github.com/hajimehoshi/ebiten/v2/inpututil"
@@ -25,7 +26,6 @@ type ScenePlay struct {
 	Game   *Game
 	Config *Config
 	Next   SceneName
-	Prev   SceneName
 	Whoami SceneName
 
 	Clear bool
@@ -48,8 +48,6 @@ type ScenePlay struct {
 	Mark, Point                                image.Point   // area to marks+save
 	RunOneStep                                 bool          // mutable flags from config
 	TPG                                        int
-	Pixels                                     []byte
-	PixelColor                                 []byte
 }
 
 func NewPlayScene(game *Game, config *Config) Scene {
@@ -75,10 +73,6 @@ func (scene *ScenePlay) GetNext() SceneName {
 	return scene.Next
 }
 
-func (scene *ScenePlay) SetPrevious(prev SceneName) {
-	scene.Prev = prev
-}
-
 func (scene *ScenePlay) ResetNext() {
 	scene.Next = scene.Whoami
 }
@@ -132,13 +126,11 @@ func (scene *ScenePlay) UpdateCells() {
 			// change state of current cell in next grid
 			scene.Grids[next].Data[y][x] = nextstate
 
-			if scene.Config.ShowEvolution {
-				// set history  to current generation so we  can infer the
-				// age of the cell's state  during rendering and use it to
-				// deduce the color to use if evolution tracing is enabled
-				if state != nextstate {
-					scene.History.Data[y][x] = scene.Generations
-				}
+			// set history  to current generation so we  can infer the
+			// age of the cell's state  during rendering and use it to
+			// deduce the color to use if evolution tracing is enabled
+			if state != nextstate {
+				scene.History.Data[y][x] = scene.Generations
 			}
 		}
 	}
@@ -158,100 +150,24 @@ func (scene *ScenePlay) UpdateCells() {
 	scene.TicksElapsed = 0
 }
 
-// 2: works but still too slow
-func (scene *ScenePlay) UpdatePixels() {
-	var col byte
-	width := scene.World.Bounds().Dx()
-	idx := 0
-
-	for y := 0; y < scene.Config.Height; y++ {
-		for x := 0; x < scene.Config.Width; x++ {
-			col = scene.PixelColor[scene.Grids[scene.Index].Data[y][x]]
-
-			ypx := y * scene.Config.Cellsize
-			for Y := ypx; Y < ypx+scene.Config.Cellsize; Y++ {
-				xpx := x * scene.Config.Cellsize
-				for X := xpx; X < xpx+scene.Config.Cellsize; X++ {
-					idx = 4 * (X + Y*width)
-
-					scene.Pixels[idx] = col
-					scene.Pixels[idx+1] = col
-					scene.Pixels[idx+2] = col
-					scene.Pixels[idx+3] = 0xff
-
-					idx++
-				}
-			}
-		}
-	}
-
-	scene.Cache.WritePixels(scene.Pixels)
-}
-
-// 1: works, but a little slower than 2
-func (scene *ScenePlay) _UpdatePixels() {
-	var col byte
-
-	gridx := 0
-	gridy := 0
-	idx := 0
-
-	width := scene.World.Bounds().Dx()
-	height := scene.World.Bounds().Dy()
-
-	for y := 0; y < height; y++ {
-		gridy = y / scene.Config.Cellsize // compute once per row
-
-		for x := 0; x < width; x++ {
-			gridx = x / scene.Config.Cellsize
-
-			col = scene.PixelColor[scene.Grids[scene.Index].Data[gridy][gridx]]
-
-			if scene.Config.ShowGrid {
-				if x%scene.Config.Cellsize == 0 || y%scene.Config.Cellsize == 0 {
-					col = scene.PixelColor[2]
-				}
-			}
-
-			idx = 4 * (x + y*width)
-
-			scene.Pixels[idx] = col
-			scene.Pixels[idx+1] = col
-			scene.Pixels[idx+2] = col
-			scene.Pixels[idx+3] = 0xff
-
-			idx++
-		}
-	}
-
-	scene.Cache.WritePixels(scene.Pixels)
-}
-
 func (scene *ScenePlay) Reset() {
 	scene.Config.Paused = true
-	scene.InitGrid()
+	scene.InitGrid(nil)
 	scene.Config.Paused = false
 }
 
 // check user input
-func (scene *ScenePlay) CheckExit() error {
+func (scene *ScenePlay) CheckInput() {
 	if inpututil.IsKeyJustPressed(ebiten.KeyQ) {
-		return ebiten.Termination
+		os.Exit(0)
 	}
 
-	return nil
-}
-
-func (scene *ScenePlay) CheckInput() {
 	if inpututil.IsKeyJustPressed(ebiten.KeyEscape) {
 		scene.SetNext(Menu)
 	}
 
-	if inpututil.IsKeyJustPressed(ebiten.KeyO) {
-		scene.SetNext(Options)
-	}
-
 	if inpututil.IsKeyJustPressed(ebiten.KeyC) {
+		fmt.Println("mark mode on")
 		scene.Config.Markmode = true
 		scene.Config.Paused = true
 	}
@@ -372,10 +288,6 @@ func (scene *ScenePlay) CheckMarkInput() {
 		return
 	}
 
-	if inpututil.IsKeyJustPressed(ebiten.KeyEscape) {
-		scene.Config.Markmode = false
-	}
-
 	if ebiten.IsMouseButtonPressed(ebiten.MouseButton0) {
 		if !scene.MarkTaken {
 			scene.Mark = scene.GetWorldCursorPos()
@@ -396,7 +308,7 @@ func (scene *ScenePlay) CheckMarkInput() {
 
 func (scene *ScenePlay) SaveState() {
 	filename := GetFilename(scene.Generations)
-	err := scene.Grids[scene.Index].SaveState(filename, scene.Config.Rule.Definition)
+	err := scene.Grids[scene.Index].SaveState(filename)
 	if err != nil {
 		log.Printf("failed to save game state to %s: %s", filename, err)
 	}
@@ -458,8 +370,7 @@ func (scene *ScenePlay) SaveRectRLE() {
 func (scene *ScenePlay) Update() error {
 	if scene.Config.Restart {
 		scene.Config.Restart = false
-		scene.Generations = 0
-		scene.InitGrid()
+		scene.InitGrid(nil)
 		scene.InitCache()
 		return nil
 	}
@@ -471,10 +382,6 @@ func (scene *ScenePlay) Update() error {
 		return nil
 	}
 
-	if quit := scene.CheckExit(); quit != nil {
-		return quit
-	}
-
 	scene.CheckInput()
 	scene.CheckDraggingInput()
 	scene.CheckMarkInput()
@@ -506,50 +413,47 @@ func (scene *ScenePlay) Draw(screen *ebiten.Image) {
 	// a nice grey grid with grid lines
 	op := &ebiten.DrawImageOptions{}
 
-	scene.UpdatePixels()
-
 	op.GeoM.Translate(0, 0)
 	scene.World.DrawImage(scene.Cache, op)
 
-	/*
-		var age int64
+	var age int64
 
-		for y := 0; y < scene.Config.Height; y++ {
-			for x := 0; x < scene.Config.Width; x++ {
-				op.GeoM.Reset()
-				op.GeoM.Translate(
-					float64(x*scene.Config.Cellsize),
-					float64(y*scene.Config.Cellsize),
-				)
+	for y := 0; y < scene.Config.Height; y++ {
+		for x := 0; x < scene.Config.Width; x++ {
+			op.GeoM.Reset()
+			op.GeoM.Translate(
+				float64(x*scene.Config.Cellsize),
+				float64(y*scene.Config.Cellsize),
+			)
 
-				age = scene.Generations - scene.History.Data[y][x]
+			age = scene.Generations - scene.History.Data[y][x]
 
-				switch scene.Grids[scene.Index].Data[y][x] {
-				case Alive:
-					if age > 50 && scene.Config.ShowEvolution {
-						scene.World.DrawImage(scene.Tiles.Old, op)
+			switch scene.Grids[scene.Index].Data[y][x] {
+			case Alive:
+				if age > 50 && scene.Config.ShowEvolution {
+					scene.World.DrawImage(scene.Tiles.Old, op)
 
-					} else {
-						scene.World.DrawImage(scene.Tiles.Black, op)
-					}
-				case Dead:
-					// only draw dead cells in case evolution trace is enabled
-					if scene.History.Data[y][x] > 1 && scene.Config.ShowEvolution {
-						switch {
-						case age < 10:
-							scene.World.DrawImage(scene.Tiles.Age1, op)
-						case age < 20:
-							scene.World.DrawImage(scene.Tiles.Age2, op)
-						case age < 30:
-							scene.World.DrawImage(scene.Tiles.Age3, op)
-						default:
-							scene.World.DrawImage(scene.Tiles.Age4, op)
-						}
+				} else {
+					scene.World.DrawImage(scene.Tiles.Black, op)
+				}
+			case Dead:
+				// only draw dead cells in case evolution trace is enabled
+				if scene.History.Data[y][x] > 1 && scene.Config.ShowEvolution {
+					switch {
+					case age < 10:
+						scene.World.DrawImage(scene.Tiles.Age1, op)
+					case age < 20:
+						scene.World.DrawImage(scene.Tiles.Age2, op)
+					case age < 30:
+						scene.World.DrawImage(scene.Tiles.Age3, op)
+					default:
+						scene.World.DrawImage(scene.Tiles.Age4, op)
 					}
 				}
 			}
 		}
-	*/
+	}
+
 	scene.DrawMark(scene.World)
 
 	scene.Camera.Render(scene.World, screen)
@@ -585,10 +489,6 @@ func (scene *ScenePlay) DrawDebug(screen *ebiten.Image) {
 			paused = "-- paused --"
 		}
 
-		if scene.Config.Markmode {
-			paused = "-- mark --"
-		}
-
 		x, y := ebiten.CursorPosition()
 		debug := fmt.Sprintf(
 			DEBUG_FORMAT,
@@ -642,7 +542,19 @@ func (scene *ScenePlay) InitCache() {
 }
 
 // initialize grid[s], either using pre-computed from state or rle file, or random
-func (scene *ScenePlay) InitGrid() {
+func (scene *ScenePlay) InitGrid(grid *Grid) {
+	if grid != nil {
+		// use pre-loaded grid
+		scene.Grids = []*Grid{
+			grid,
+			NewGrid(grid.Width, grid.Height, 0, false),
+		}
+
+		scene.History = NewGrid(grid.Width, grid.Height, 0, false)
+
+		return
+	}
+
 	grida := NewGrid(scene.Config.Width, scene.Config.Height, scene.Config.Density, scene.Config.Empty)
 	gridb := NewGrid(scene.Config.Width, scene.Config.Height, scene.Config.Density, scene.Config.Empty)
 	history := NewGrid(scene.Config.Width, scene.Config.Height, scene.Config.Density, scene.Config.Empty)
@@ -702,17 +614,17 @@ func (scene *ScenePlay) InitTiles() {
 
 func (scene *ScenePlay) Init() {
 	// setup the scene
+	var grid *Grid
+
+	if scene.Config.StateGrid != nil {
+		grid = scene.Config.StateGrid
+	}
+
 	scene.Camera = Camera{
 		ViewPort: f64.Vec2{
 			float64(scene.Config.ScreenWidth),
 			float64(scene.Config.ScreenHeight),
 		},
-		InitialZoomFactor: scene.Config.Zoomfactor,
-		InitialPosition: f64.Vec2{
-			scene.Config.InitialCamPos[0],
-			scene.Config.InitialCamPos[1],
-		},
-		ZoomOutFactor: scene.Config.ZoomOutFactor,
 	}
 
 	scene.World = ebiten.NewImage(
@@ -725,17 +637,15 @@ func (scene *ScenePlay) Init() {
 		scene.Config.Height*scene.Config.Cellsize,
 	)
 
-	scene.Pixels = make([]byte, scene.World.Bounds().Dx()*scene.World.Bounds().Dy()*scene.Config.Cellsize)
-
 	scene.InitTiles()
 	scene.InitCache()
 
 	if scene.Config.DelayedStart && !scene.Config.Empty {
 		scene.Config.Empty = true
-		scene.InitGrid()
+		scene.InitGrid(grid)
 		scene.Config.Empty = false
 	} else {
-		scene.InitGrid()
+		scene.InitGrid(grid)
 	}
 
 	scene.InitPattern()
@@ -749,12 +659,8 @@ func (scene *ScenePlay) Init() {
 		scene.Camera.ZoomFactor = scene.Config.Zoomfactor
 	}
 
-	scene.Camera.Setup()
-
-	scene.PixelColor = make([]byte, 3)
-	scene.PixelColor[0] = 0xff
-	scene.PixelColor[1] = 0x00
-	scene.PixelColor[2] = 0xff
+	scene.Camera.Position[0] = scene.Config.InitialCamPos[0]
+	scene.Camera.Position[1] = scene.Config.InitialCamPos[1]
 }
 
 // count the living neighbors of a cell
@@ -797,8 +703,8 @@ func FillCell(tile *ebiten.Image, cellsize int, col color.RGBA) {
 		tile,
 		float32(1),
 		float32(1),
-		float32(cellsize),
-		float32(cellsize),
+		float32(cellsize-1),
+		float32(cellsize-1),
 		col, false,
 	)
 }

scene.go

@@ -13,7 +13,6 @@ type SceneName int
 type Scene interface {
 	SetNext(SceneName)
 	GetNext() SceneName
-	SetPrevious(SceneName)
 	ResetNext()
 	Update() error
 	Draw(screen *ebiten.Image)

src/Makefile

@@ -1,97 +0,0 @@
-# Copyright © 2024 Thomas von Dein
-
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-
-# You should have received a copy of the GNU General Public License
-# along with this program. If not, see <http://www.gnu.org/licenses/>.
-
-
-#
-# no need to modify anything below
-tool      = golsky
-VERSION   = $(shell grep VERSION main.go | head -1 | cut -d '"' -f2)
-archs     = darwin freebsd linux windows
-PREFIX    = /usr/local
-UID       = root
-GID       = 0
-HAVE_POD := $(shell pod2text -h 2>/dev/null)
-#TAGS      = -tags=ebitenginedebug
-
-all: buildlocal
-
-
-buildlocal:
-	go build $(TAGS) -o $(tool)
-
-install: buildlocal
-	install -d -o $(UID) -g $(GID) $(PREFIX)/bin
-	install -d -o $(UID) -g $(GID) $(PREFIX)/man/man1
-	install -o $(UID) -g $(GID) -m 555 $(tool)  $(PREFIX)/sbin/
-	install -o $(UID) -g $(GID) -m 444 $(tool).1 $(PREFIX)/man/man1/
-
-clean:
-	rm -rf $(tool) coverage.out testdata t/out
-
-test: clean
-	mkdir -p t/out
-	go test ./... $(ARGS)
-
-testlint: test lint
-
-lint:
-	golangci-lint run
-
-lint-full:
-	golangci-lint run --enable-all --exclude-use-default --disable exhaustivestruct,exhaustruct,depguard,interfacer,deadcode,golint,structcheck,scopelint,varcheck,ifshort,maligned,nosnakecase,godot,funlen,gofumpt,cyclop,noctx,gochecknoglobals,paralleltest
-
-testfuzzy: clean
-	go test -fuzz ./... $(ARGS)
-
-singletest:
-	@echo "Call like this: make singletest TEST=TestPrepareColumns ARGS=-v"
-	go test -run $(TEST) $(ARGS)
-
-cover-report:
-	go test ./... -cover -coverprofile=coverage.out
-	go tool cover -html=coverage.out
-
-goupdate:
-	go get -t -u=patch ./...
-
-buildall:
-	./mkrel.sh $(tool) $(VERSION)
-
-release: buildall
-	gh release create $(VERSION) --generate-notes releases/*
-
-show-versions: buildlocal
-	@echo "### golsky version:"
-	@./golsky -V
-
-	@echo
-	@echo "### go module versions:"
-	@go list -m all
-
-	@echo
-	@echo "### go version used for building:"
-	@grep -m 1 go go.mod
-
-# lint:
-# 	golangci-lint run -p bugs -p unused
-
-buildwasm:
-	env GOOS=js GOARCH=wasm go build -o $(tool).wasm $(LDFLAGS) .
-
-zipwasm:
-	zip -r openquell-$(SHORTVERSION).zip index.html $(tool).wasm wasm_exec.js
-
-wasm: buildwasm zipwasm
-	@ls -l $(tool)-$(SHORTVERSION).zip

various-tests/drawtriangles/go.mod

@@ -1,13 +0,0 @@
-module drawminimal
-
-go 1.22
-
-require (
-	github.com/ebitengine/gomobile v0.0.0-20240518074828-e86332849895 // indirect
-	github.com/ebitengine/hideconsole v1.0.0 // indirect
-	github.com/ebitengine/purego v0.7.0 // indirect
-	github.com/hajimehoshi/ebiten/v2 v2.7.4 // indirect
-	github.com/jezek/xgb v1.1.1 // indirect
-	golang.org/x/sync v0.7.0 // indirect
-	golang.org/x/sys v0.20.0 // indirect
-)

various-tests/drawtriangles/go.sum

@@ -1,14 +0,0 @@
-github.com/ebitengine/gomobile v0.0.0-20240518074828-e86332849895 h1:48bCqKTuD7Z0UovDfvpCn7wZ0GUZ+yosIteNDthn3FU=
-github.com/ebitengine/gomobile v0.0.0-20240518074828-e86332849895/go.mod h1:XZdLv05c5hOZm3fM2NlJ92FyEZjnslcMcNRrhxs8+8M=
-github.com/ebitengine/hideconsole v1.0.0 h1:5J4U0kXF+pv/DhiXt5/lTz0eO5ogJ1iXb8Yj1yReDqE=
-github.com/ebitengine/hideconsole v1.0.0/go.mod h1:hTTBTvVYWKBuxPr7peweneWdkUwEuHuB3C1R/ielR1A=
-github.com/ebitengine/purego v0.7.0 h1:HPZpl61edMGCEW6XK2nsR6+7AnJ3unUxpTZBkkIXnMc=
-github.com/ebitengine/purego v0.7.0/go.mod h1:ah1In8AOtksoNK6yk5z1HTJeUkC1Ez4Wk2idgGslMwQ=
-github.com/hajimehoshi/ebiten/v2 v2.7.4 h1:X+heODRQ3Ie9F9QFjm24gEZqQd5FSfR9XuT2XfHwgf8=
-github.com/hajimehoshi/ebiten/v2 v2.7.4/go.mod h1:H2pHVgq29rfm5yeQ7jzWOM3VHsjo7/AyucODNLOhsVY=
-github.com/jezek/xgb v1.1.1 h1:bE/r8ZZtSv7l9gk6nU0mYx51aXrvnyb44892TwSaqS4=
-github.com/jezek/xgb v1.1.1/go.mod h1:nrhwO0FX/enq75I7Y7G8iN1ubpSGZEiA3v9e9GyRFlk=
-golang.org/x/sync v0.7.0 h1:YsImfSBoP9QPYL0xyKJPq0gcaJdG3rInoqxTWbfQu9M=
-golang.org/x/sync v0.7.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
-golang.org/x/sys v0.20.0 h1:Od9JTbYCk261bKm4M/mw7AklTlFYIa0bIp9BgSm1S8Y=
-golang.org/x/sys v0.20.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=

various-tests/drawtriangles/main.go

@@ -1,362 +0,0 @@
-package main
-
-import (
-	"fmt"
-	"image"
-	"image/color"
-	"log"
-	"math/rand"
-	"os"
-	"runtime/pprof"
-
-	"github.com/hajimehoshi/ebiten/v2"
-	"github.com/hajimehoshi/ebiten/v2/inpututil"
-	"github.com/hajimehoshi/ebiten/v2/vector"
-)
-
-var (
-	blackImage    = ebiten.NewImage(3, 3)
-	blackSubImage = blackImage.SubImage(image.Rect(1, 1, 2, 2)).(*ebiten.Image)
-)
-
-type Images struct {
-	Black, White *ebiten.Image
-}
-
-type Grid struct {
-	Data                   [][]int64
-	Width, Height, Density int
-}
-
-// Create new empty grid and allocate Data according to provided dimensions
-func NewGrid(width, height, density int) *Grid {
-	grid := &Grid{
-		Height:  height,
-		Width:   width,
-		Density: density,
-		Data:    make([][]int64, height),
-	}
-
-	for y := 0; y < height; y++ {
-		grid.Data[y] = make([]int64, width)
-	}
-
-	return grid
-}
-
-// live console output of the grid
-func (grid *Grid) Dump() {
-	/*
-		cmd := exec.Command("clear")
-		cmd.Stdout = os.Stdout
-		cmd.Run()
-
-		for y := 0; y < grid.Height; y++ {
-			for x := 0; x < grid.Width; x++ {
-				if grid.Data[y][x] == 1 {
-					fmt.Print("XX")
-				} else {
-					fmt.Print("  ")
-				}
-			}
-			fmt.Println()
-		}
-	*/
-	fmt.Printf("FPS: %0.2f\n", ebiten.ActualTPS())
-}
-
-type Game struct {
-	Width, Height, Cellsize, Density int
-	ScreenWidth, ScreenHeight        int
-	Grids                            []*Grid
-	Index                            int
-	Black, White, Grey               color.RGBA
-	Tiles                            Images
-	Cache                            *ebiten.Image
-	Elapsed                          int64
-	TPG                              int64 // adjust game speed independently of TPS
-	Vertices                         []ebiten.Vertex
-	Indices                          []uint16
-	Pause, Debug                     bool
-}
-
-// fill a cell
-func FillCell(tile *ebiten.Image, cellsize int, col color.RGBA) {
-	vector.DrawFilledRect(
-		tile,
-		float32(1),
-		float32(1),
-		float32(cellsize-1),
-		float32(cellsize-1),
-		col, false,
-	)
-}
-
-func (game *Game) Layout(outsideWidth, outsideHeight int) (int, int) {
-	return game.ScreenWidth, game.ScreenHeight
-}
-
-func (game *Game) Init() {
-	// setup two grids, one for display, one for next state
-	grida := NewGrid(game.Width, game.Height, game.Density)
-	gridb := NewGrid(game.Width, game.Height, game.Density)
-
-	for y := 0; y < game.Height; y++ {
-		for x := 0; x < game.Width; x++ {
-			if rand.Intn(game.Density) == 1 {
-				grida.Data[y][x] = 1
-			}
-		}
-
-	}
-
-	game.Grids = []*Grid{
-		grida,
-		gridb,
-	}
-
-	// setup colors
-	game.Grey = color.RGBA{128, 128, 128, 0xff}
-	game.Black = color.RGBA{0, 0, 0, 0xff}
-	game.White = color.RGBA{200, 200, 200, 0xff}
-
-	game.Tiles.White = ebiten.NewImage(game.Cellsize, game.Cellsize)
-	game.Cache = ebiten.NewImage(game.ScreenWidth, game.ScreenHeight)
-
-	FillCell(game.Tiles.White, game.Cellsize, game.White)
-	game.Cache.Fill(game.Grey)
-
-	// draw the offscreen image
-	op := &ebiten.DrawImageOptions{}
-	for y := 0; y < game.Height; y++ {
-		for x := 0; x < game.Width; x++ {
-			op.GeoM.Reset()
-			op.GeoM.Translate(float64(x*game.Cellsize), float64(y*game.Cellsize))
-			game.Cache.DrawImage(game.Tiles.White, op)
-		}
-	}
-
-	blackSubImage.Fill(game.Black)
-
-	lenvertices := game.ScreenHeight * game.ScreenWidth
-	game.Vertices = make([]ebiten.Vertex, lenvertices)
-	game.Indices = make([]uint16, lenvertices+(lenvertices/2))
-}
-
-// count the living neighbors of a cell
-func (game *Game) CountNeighbors(x, y int) int64 {
-	var sum int64
-
-	for nbgX := -1; nbgX < 2; nbgX++ {
-		for nbgY := -1; nbgY < 2; nbgY++ {
-			var col, row int
-
-			// Wrap  mode we look  at all the 8  neighbors surrounding
-			//  us.  In  case we  are  on an  edge we'll  look at  the
-			// neighbor on  the other side of the  grid, thus wrapping
-			// lookahead around using the mod() function.
-			col = (x + nbgX + game.Width) % game.Width
-			row = (y + nbgY + game.Height) % game.Height
-
-			sum += game.Grids[game.Index].Data[row][col]
-		}
-	}
-
-	// don't count ourselfes though
-	sum -= game.Grids[game.Index].Data[y][x]
-
-	return sum
-}
-
-// the heart of the game
-func (game *Game) CheckRule(state int64, neighbors int64) int64 {
-	var nextstate int64
-
-	if state == 0 && neighbors == 3 {
-		nextstate = 1
-	} else if state == 1 && (neighbors == 2 || neighbors == 3) {
-		nextstate = 1
-	} else {
-		nextstate = 0
-	}
-
-	return nextstate
-}
-
-// we only  update the cells if  we are not  in pause state or  if the
-// game timer (TPG) is elapsed.
-func (game *Game) UpdateCells() {
-	if game.Pause {
-		return
-	}
-
-	if game.Elapsed < game.TPG {
-		game.Elapsed++
-		return
-	}
-
-	// next grid index. we only have to, so we just xor it
-	next := game.Index ^ 1
-
-	// reset vertices
-	// FIXME: fails!
-	game.ClearVertices()
-
-	// calculate cell life state, this is the actual game of life
-	for y := 0; y < game.Height; y++ {
-		for x := 0; x < game.Width; x++ {
-			state := game.Grids[game.Index].Data[y][x] // 0|1 == dead or alive
-			neighbors := game.CountNeighbors(x, y)     // alive neighbor count
-
-			// actually apply the current rules
-			nextstate := game.CheckRule(state, neighbors)
-
-			// change state of current cell in next grid
-			game.Grids[next].Data[y][x] = nextstate
-		}
-	}
-
-	// calculate triangles for rendering
-	game.UpdateTriangles()
-
-	// switch grid for rendering
-	game.Index ^= 1
-
-	game.Elapsed = 0
-
-	if game.Debug {
-		game.Grids[next].Dump()
-	}
-}
-
-func (game *Game) Update() error {
-	game.UpdateCells()
-
-	if inpututil.IsKeyJustPressed(ebiten.KeySpace) {
-		game.Pause = !game.Pause
-	}
-
-	return nil
-}
-
-func (game *Game) ClearVertices() {
-	// FIXME: fails
-	for i := 0; i < len(game.Vertices); i++ {
-		game.Vertices[i] = ebiten.Vertex{}
-		// game.Vertices[i].DstX = 0
-		// game.Vertices[i].DstY = 1
-	}
-
-	game.Indices = game.Indices[:len(game.Indices)]
-}
-
-// create the triangles needed for rendering. Actual rendering doesn't
-// happen here but in Draw()
-func (game *Game) UpdateTriangles() {
-	var base uint16 = 0
-	var index uint16 = 0
-
-	idx := 0
-
-	// iterate over every cell
-	for celly := 0; celly < game.Height; celly++ {
-		for cellx := 0; cellx < game.Width; cellx++ {
-
-			// if the cell is alife
-			if game.Grids[game.Index].Data[celly][cellx] == 1 {
-
-				/* iterate over the cell's corners:
-				0   1
-
-				2   3
-				*/
-				for i := 0; i < 2; i++ {
-					for j := 0; j < 2; j++ {
-
-						// calculate the corner position
-						x := (cellx * game.Cellsize) + (i * game.Cellsize) + 1
-						y := (celly * game.Cellsize) + (j * game.Cellsize) + 1
-
-						if i == 1 {
-							x -= 1
-						}
-						if j == 1 {
-							y -= 1
-						}
-
-						// setup the vertex
-						game.Vertices[idx].DstX = float32(x)
-						game.Vertices[idx].DstY = float32(y)
-						game.Vertices[idx].SrcX = 1
-						game.Vertices[idx].SrcY = 1
-						game.Vertices[idx].ColorR = float32(game.Black.R)
-						game.Vertices[idx].ColorG = float32(game.Black.G)
-						game.Vertices[idx].ColorB = float32(game.Black.B)
-						game.Vertices[idx].ColorA = 1
-
-						idx++
-					}
-				}
-			}
-
-			// indices for first triangle
-			game.Indices[index] = base
-			game.Indices[index+1] = base + 1
-			game.Indices[index+2] = base + 3
-
-			// for the second one
-			game.Indices[index+3] = base
-			game.Indices[index+4] = base + 2
-			game.Indices[index+5] = base + 3
-
-			index += 6 // 3 indicies per triangle
-
-			base += 4 // 4 vertices per cell
-		}
-	}
-}
-
-func (game *Game) Draw(screen *ebiten.Image) {
-	op := &ebiten.DrawImageOptions{}
-
-	op.GeoM.Translate(0, 0)
-	screen.DrawImage(game.Cache, op)
-
-	triop := &ebiten.DrawTrianglesOptions{}
-	screen.DrawTriangles(game.Vertices, game.Indices, blackSubImage, triop)
-}
-
-func main() {
-	size := 200
-
-	game := &Game{
-		Width:    size,
-		Height:   size,
-		Cellsize: 4,
-		Density:  5,
-		TPG:      5,
-		Debug:    true,
-	}
-
-	game.ScreenWidth = game.Width * game.Cellsize
-	game.ScreenHeight = game.Height * game.Cellsize
-
-	game.Init()
-
-	ebiten.SetWindowSize(game.ScreenWidth, game.ScreenHeight)
-	ebiten.SetWindowTitle("triangle conway's game of life")
-	ebiten.SetWindowResizingMode(ebiten.WindowResizingModeEnabled)
-
-	fd, err := os.Create("cpu.profile")
-	if err != nil {
-		log.Fatal(err)
-	}
-	defer fd.Close()
-
-	pprof.StartCPUProfile(fd)
-	defer pprof.StopCPUProfile()
-
-	if err := ebiten.RunGame(game); err != nil {
-		log.Fatal(err)
-	}
-}

various-tests/writepixel/go.mod

@@ -1,13 +0,0 @@
-module testgol
-
-go 1.22
-
-require (
-	github.com/ebitengine/gomobile v0.0.0-20240518074828-e86332849895 // indirect
-	github.com/ebitengine/hideconsole v1.0.0 // indirect
-	github.com/ebitengine/purego v0.7.0 // indirect
-	github.com/hajimehoshi/ebiten/v2 v2.7.4 // indirect
-	github.com/jezek/xgb v1.1.1 // indirect
-	golang.org/x/sync v0.7.0 // indirect
-	golang.org/x/sys v0.20.0 // indirect
-)

various-tests/writepixel/go.sum

@@ -1,14 +0,0 @@
-github.com/ebitengine/gomobile v0.0.0-20240518074828-e86332849895 h1:48bCqKTuD7Z0UovDfvpCn7wZ0GUZ+yosIteNDthn3FU=
-github.com/ebitengine/gomobile v0.0.0-20240518074828-e86332849895/go.mod h1:XZdLv05c5hOZm3fM2NlJ92FyEZjnslcMcNRrhxs8+8M=
-github.com/ebitengine/hideconsole v1.0.0 h1:5J4U0kXF+pv/DhiXt5/lTz0eO5ogJ1iXb8Yj1yReDqE=
-github.com/ebitengine/hideconsole v1.0.0/go.mod h1:hTTBTvVYWKBuxPr7peweneWdkUwEuHuB3C1R/ielR1A=
-github.com/ebitengine/purego v0.7.0 h1:HPZpl61edMGCEW6XK2nsR6+7AnJ3unUxpTZBkkIXnMc=
-github.com/ebitengine/purego v0.7.0/go.mod h1:ah1In8AOtksoNK6yk5z1HTJeUkC1Ez4Wk2idgGslMwQ=
-github.com/hajimehoshi/ebiten/v2 v2.7.4 h1:X+heODRQ3Ie9F9QFjm24gEZqQd5FSfR9XuT2XfHwgf8=
-github.com/hajimehoshi/ebiten/v2 v2.7.4/go.mod h1:H2pHVgq29rfm5yeQ7jzWOM3VHsjo7/AyucODNLOhsVY=
-github.com/jezek/xgb v1.1.1 h1:bE/r8ZZtSv7l9gk6nU0mYx51aXrvnyb44892TwSaqS4=
-github.com/jezek/xgb v1.1.1/go.mod h1:nrhwO0FX/enq75I7Y7G8iN1ubpSGZEiA3v9e9GyRFlk=
-golang.org/x/sync v0.7.0 h1:YsImfSBoP9QPYL0xyKJPq0gcaJdG3rInoqxTWbfQu9M=
-golang.org/x/sync v0.7.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
-golang.org/x/sys v0.20.0 h1:Od9JTbYCk261bKm4M/mw7AklTlFYIa0bIp9BgSm1S8Y=
-golang.org/x/sys v0.20.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=

various-tests/writepixel/main.go

@@ -1,294 +0,0 @@
-package main
-
-import (
-	"fmt"
-	"log"
-	"math/rand"
-	"os"
-	"os/exec"
-	"runtime/pprof"
-
-	"github.com/hajimehoshi/ebiten/v2"
-	"github.com/hajimehoshi/ebiten/v2/inpututil"
-)
-
-type Images struct {
-	Black, White *ebiten.Image
-}
-
-type Grid struct {
-	Data                   [][]int64
-	Width, Height, Density int
-}
-
-// Create new empty grid and allocate Data according to provided dimensions
-func NewGrid(width, height, density int) *Grid {
-	grid := &Grid{
-		Height:  height,
-		Width:   width,
-		Density: density,
-		Data:    make([][]int64, height),
-	}
-
-	for y := 0; y < height; y++ {
-		grid.Data[y] = make([]int64, width)
-	}
-
-	return grid
-}
-
-type Game struct {
-	Width, Height, Cellsize, Density int
-	ScreenWidth, ScreenHeight        int
-	Grids                            []*Grid
-	Index                            int
-	Elapsed                          int64
-	TPG                              int64 // adjust game speed independently of TPS
-	Pause, Debug, Profile, Gridlines bool
-	Pixels                           []byte
-	OffScreen                        *ebiten.Image
-}
-
-func (game *Game) Layout(outsideWidth, outsideHeight int) (int, int) {
-	return game.ScreenWidth, game.ScreenHeight
-}
-
-// live console output of the grid
-func (game *Game) DebugDump() {
-	cmd := exec.Command("clear")
-	cmd.Stdout = os.Stdout
-	cmd.Run()
-
-	if game.Debug {
-		for y := 0; y < game.Height; y++ {
-			for x := 0; x < game.Width; x++ {
-				if game.Grids[game.Index].Data[y][x] == 1 {
-					fmt.Print("XX")
-				} else {
-					fmt.Print("  ")
-				}
-			}
-			fmt.Println()
-		}
-	}
-	fmt.Printf("FPS: %0.2f\n", ebiten.ActualTPS())
-}
-
-func (game *Game) Init() {
-	// setup two grids, one for display, one for next state
-	grida := NewGrid(game.Width, game.Height, game.Density)
-	gridb := NewGrid(game.Width, game.Height, game.Density)
-
-	for y := 0; y < game.Height; y++ {
-		for x := 0; x < game.Width; x++ {
-			if rand.Intn(game.Density) == 1 {
-				grida.Data[y][x] = 1
-			}
-		}
-
-	}
-
-	game.Grids = []*Grid{
-		grida,
-		gridb,
-	}
-
-	game.Pixels = make([]byte, game.ScreenWidth*game.ScreenHeight*4)
-
-	game.OffScreen = ebiten.NewImage(game.ScreenWidth, game.ScreenHeight)
-}
-
-// count the living neighbors of a cell
-func (game *Game) CountNeighbors(x, y int) int64 {
-	var sum int64
-
-	for nbgX := -1; nbgX < 2; nbgX++ {
-		for nbgY := -1; nbgY < 2; nbgY++ {
-			var col, row int
-
-			// Wrap  mode we look  at all the 8  neighbors surrounding
-			//  us.  In  case we  are  on an  edge we'll  look at  the
-			// neighbor on  the other side of the  grid, thus wrapping
-			// lookahead around using the mod() function.
-			col = (x + nbgX + game.Width) % game.Width
-			row = (y + nbgY + game.Height) % game.Height
-
-			sum += game.Grids[game.Index].Data[row][col]
-		}
-	}
-
-	// don't count ourselfes though
-	sum -= game.Grids[game.Index].Data[y][x]
-
-	return sum
-}
-
-// the heart of the game
-func (game *Game) CheckRule(state int64, neighbors int64) int64 {
-	var nextstate int64
-
-	if state == 0 && neighbors == 3 {
-		nextstate = 1
-	} else if state == 1 && (neighbors == 2 || neighbors == 3) {
-		nextstate = 1
-	} else {
-		nextstate = 0
-	}
-
-	return nextstate
-}
-
-// we only  update the cells if  we are not  in pause state or  if the
-// game timer (TPG) is elapsed.
-func (game *Game) UpdateCells() {
-	if game.Pause {
-		return
-	}
-
-	if game.Elapsed < game.TPG {
-		game.Elapsed++
-		return
-	}
-
-	// next grid index. we only have to, so we just xor it
-	next := game.Index ^ 1
-
-	// calculate cell life state, this is the actual game of life
-	for y := 0; y < game.Height; y++ {
-		for x := 0; x < game.Width; x++ {
-			state := game.Grids[game.Index].Data[y][x] // 0|1 == dead or alive
-			neighbors := game.CountNeighbors(x, y)     // alive neighbor count
-
-			// actually apply the current rules
-			nextstate := game.CheckRule(state, neighbors)
-
-			// change state of current cell in next grid
-			game.Grids[next].Data[y][x] = nextstate
-		}
-	}
-
-	// switch grid for rendering
-	game.Index ^= 1
-
-	game.Elapsed = 0
-
-	game.UpdatePixels()
-}
-
-func (game *Game) Update() error {
-	game.UpdateCells()
-
-	if inpututil.IsKeyJustPressed(ebiten.KeySpace) {
-		game.Pause = !game.Pause
-	}
-
-	return nil
-}
-
-/*
-*
-r, g, b := color(it)
-
-	78             p := 4 * (i + j*screenWidth)
-	79             gm.offscreenPix[p] = r
-	80             gm.offscreenPix[p+1] = g
-	81             gm.offscreenPix[p+2] = b
-	82             gm.offscreenPix[p+3] = 0xff
-*/
-func (game *Game) UpdatePixels() {
-	var col byte
-
-	gridx := 0
-	gridy := 0
-	idx := 0
-
-	for y := 0; y < game.ScreenHeight; y++ {
-		for x := 0; x < game.ScreenWidth; x++ {
-			gridx = x / game.Cellsize
-			gridy = y / game.Cellsize
-
-			col = 0xff
-			if game.Grids[game.Index].Data[gridy][gridx] == 1 {
-				col = 0x0
-			}
-
-			if game.Gridlines {
-				if x%game.Cellsize == 0 || y%game.Cellsize == 0 {
-					col = 128
-				}
-			}
-
-			idx = 4 * (x + y*game.ScreenWidth)
-
-			game.Pixels[idx] = col
-			game.Pixels[idx+1] = col
-			game.Pixels[idx+2] = col
-			game.Pixels[idx+3] = 0xff
-
-			idx++
-		}
-	}
-
-	game.OffScreen.WritePixels(game.Pixels)
-}
-
-func (game *Game) Draw(screen *ebiten.Image) {
-	screen.DrawImage(game.OffScreen, nil)
-	game.DebugDump()
-}
-
-func main() {
-	//x := 1
-	//y := 0
-	col := 1 >> 0xff
-
-	fmt.Printf("col: %d\n", col)
-
-	x := 1
-	y := 2
-	c := 4
-
-	xm := x & (c - 1)
-	ym := y & (c - 1)
-
-	fmt.Println(xm & ym)
-}
-
-func _main() {
-	size := 800
-
-	game := &Game{
-		Width:     size,
-		Height:    size,
-		Cellsize:  4,
-		Density:   8,
-		TPG:       10,
-		Debug:     false,
-		Profile:   false,
-		Gridlines: false,
-	}
-
-	game.ScreenWidth = game.Width * game.Cellsize
-	game.ScreenHeight = game.Height * game.Cellsize
-
-	game.Init()
-
-	ebiten.SetWindowSize(game.ScreenWidth, game.ScreenHeight)
-	ebiten.SetWindowTitle("triangle conway's game of life")
-	ebiten.SetWindowResizingMode(ebiten.WindowResizingModeEnabled)
-
-	if game.Profile {
-		fd, err := os.Create("cpu.profile")
-		if err != nil {
-			log.Fatal(err)
-		}
-		defer fd.Close()
-
-		pprof.StartCPUProfile(fd)
-		defer pprof.StopCPUProfile()
-	}
-
-	if err := ebiten.RunGame(game); err != nil {
-		log.Fatal(err)
-	}
-}

widgets.go

@@ -64,12 +64,12 @@ func NewCheckbox(
 	)
 }
 
-func NewSeparator(padding int) widget.PreferredSizeLocateableWidget {
+func NewSeparator() widget.PreferredSizeLocateableWidget {
 	c := widget.NewContainer(
 		widget.ContainerOpts.Layout(widget.NewRowLayout(
 			widget.RowLayoutOpts.Direction(widget.DirectionVertical),
 			widget.RowLayoutOpts.Padding(widget.Insets{
-				Top:    padding,
+				Top:    3,
 				Bottom: 0,
 			}))),
 		widget.ContainerOpts.WidgetOpts(